<style>
    .container {
      min-height: 100px;
      /*背景图线型渐变 从上到下*/
      background-image: linear-gradient(
        to bottom,
        rgba(251, 165, 165, 0.3) 0%,
        rgba(251, 165, 165, 0.1) 100%
      );
      border-bottom-left-radius: 50% 40%; /*左下角弧度*/
      border-bottom-right-radius: 50% 40%; /*右下角弧度*/
    }
  </style>
  <body>
    <div class="container">...</div>
  </body>